What can I do to decrease the odds of developing giardia infections?

Risk of Giardia. Giardia is prevalent worldwide, & drinking infected water is the most frequent mode of transmission (e.g. Streams, wells). Person-to-person is 2nd mode in groups with poor fecal-oral hygiene (daycare centers, custodial institutions, sexually active male homosexuals). Food transmission has been documented in commercial settings. Sheep, beavers, cattle, dogs, cats can get it & may pass it to people.